Hi BenjyvC! The most common issue we’ve seen here is that in Photoshop 2022, the Texture Tools Exporter appears under Save a Copy…, rather than under Save As… . To check, there should be two signs that Photoshop can see the plugin: it should be listed under Help > About Plugins,
and under Save a Copy…:
Since you mentioned that the plugin (nvtt_export.8bi) is visible at the directory level in the Photoshop plugins folder, that should work – the other thing I can think of is to check that the old version of the plugin (dds64.8bi) is uninstalled.
Finally, to create a normal map using the standalone Texture Tools Exporter, change Image Type from Color Map to Normal Map : Tangent Space:
You’ll then see a Normal Map Settings pane where you can change how normals are computed from the color image:
We also have a video tutorial on how to create normal maps using the NVIDIA Texture Tools Exporter in the Normal Maps section of https://developer.nvidia.com/nvidia-texture-tools-exporter.
Hope this helps - let me know if you get it working!
-Neil